Need Schematic for Parasound HCA 2200 II - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th September 2005, 09:39 PM   #1
mjctech is offline mjctech  United States
diyAudio Member
 
Join Date: Sep 2005
Question Need Schematic for Parasound HCA 2200 II

I have a HCA 2200 II, One channel will blow a fuse after running at low volume for a short time. Then sometimes the overheat light will come on and after it cools down it works again. I can feel that the right side heat sink is hotter than the left. I checked it and the left side is running around 110 F. and the right is around 140 F. I checked the temp on the heat sensor bracket on both sides. I checked the power supply volts 74 +- ,


Please help
mike
  Reply With Quote
Old 15th September 2005, 03:17 PM   #2
Leolabs is offline Leolabs  Malaysia
diyAudio Member
 
Leolabs's Avatar
 
Join Date: Dec 2004
Location: Bukit Mertajam
Send a message via MSN to Leolabs
Try to check the output offset voltage.
  Reply With Quote
Old 15th September 2005, 04:25 PM   #3
diyAudio Member
 
Join Date: Mar 2001
Location: Brazil
Default Re: Need Schematic for Parasound HCA 2200 II

Quote:
Originally posted by mjctech
I have a HCA 2200 II, One channel will blow a fuse after running at low volume for a short time. Then sometimes the overheat light will come on and after it cools down it works again. I can feel that the right side heat sink is hotter than the left. I checked it and the left side is running around 110 F. and the right is around 140 F. I checked the temp on the heat sensor bracket on both sides. I checked the power supply volts 74 +- ,

Why don't you check the voltage between the emitters on one pair of output transistors to see if current is the same for both channels?

Perhaps there has been a slight deviation in VAS' trimpots. If that is so you should rather replace both trimpots with multiturn types.

Do you know if the output zobel is getting hot too? If so there might be some oscillation, but cure might be difficult without a service manual. Do get one as soon as possible, if not you will be too much in the dark.


Carlos
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to mod a parasound hca 2200 mk2 ? Søren Kramer Solid State 13 16th August 2013 05:40 AM
Diffirent between Parasound 2200 and Mark ll pwgtang Solid State 2 14th March 2012 09:38 PM
Parasound HCA-2200 II repair question cocolino Solid State 10 6th September 2008 07:45 AM
FS: Parasound HCA-2200 MKII Zero Cool Swap Meet 3 22nd December 2007 08:15 PM
Anyone have a service manual for a Parasound 2200 (non II) marsupialx Solid State 2 8th December 2007 01:48 PM


New To Site? Need Help?

All times are GMT. The time now is 12:02 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2